In fact, there is no fixed replacement cycle for car carbon canisters, and the vehicle instruction manual does not indicate how often the carbon canisters should be replaced. As car owners, as long as the carbon canister is not damaged, there is no need to replace it.
Of course, individual 4S stores may suggest that you replace the carbon canister every 40,000 to 60,000 kilometers, but this is only a conservative estimate of the life of the canister. Whether we need to replace it according to this time depends mainly on the canister. Actual working status.
About the working principle of activated carbon canister
Because gasoline is an extremely volatile liquid, when it is stored in the vehicle fuel tank, the interior of the fuel tank is often filled with gasoline vapor. If the gasoline vapor cannot be effectively discharged, the pressure inside the fuel tank will increase and affect The pump oil of the oil pump.
The activated carbon canister is generally installed between the fuel tank and the engine. It uses the adsorption capacity of the internal activated carbon to absorb and store the gasoline vapor in the fuel tank in the carbon canister. When the engine starts, the solenoid valve between the activated charcoal tank and the intake manifold will be opened according to the instruction of the ECU. At this time, the gasoline vapor in the activated charcoal tank will be brought into the cylinder by the air under the vacuum negative pressure of the intake pipe. Participate in burning. In this way, not only unnecessary emissions are reduced, but also the fuel consumption of the engine is reduced.
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